The Research And Application Of Waste Heat Boiler Water Level Control System

With the constant improvement in recent years,the state environmental protection standards,to enhance people's environmental consciousness,gas and steam combined cycle power generation technology is gradually mature,its a lso gradually reflected in the importance of power generation enterprises,realize the energy ladder,its high degree of automation,environmental pollution is small,quick start-stop,overall cycle efficiency higher advantages are more obvious,and in the power grid in both can load effect and can be used as the main body under the base load operation advantage is more outstanding.Of waste heat boiler as an important component of the gas-steam combined cycle units,both the actual production and scientific research,the steam drum level control is the key to the overall soda circulation,this article through to HG9 FB type soda in-depth study of the control system of waste heat furnace,this paper introduces the HG9 FB type of waste heat furnace under different conditions of water control logic and rev,parked in the process of single,three impulse switch operation mode,introduced the HG9 FB type waste heat boiler steam,feed water measuring element and the measuring principle,for feed water and steam fl ow step disturbance which is caused by false level problem,develop with feedforward-feedback regulation of feed water control scheme,eliminates the integrating element without a self balancing when water supply capacity and does not consider material balance drum volume change brought about by the false level problem,solve the safety problems in practical production,this subject for mei LAN SONY adjustment valve is used in the feed water regulator,positioner adopting intelligent SVI II AP,because of its judgment,the accuracy of body position,safe sex,good reliability,high accuracy of digital,is widely applied in HG9 FB type of waste heat boiler,reduce the feedback is not caused by frequent opening and the probability of accurate,in terms of PID control and the PID parameters setting,logic control chart are introduced on drum,water supply damper logic control chart,and 30%,100% and 30% when switching logic control chart,and illustrates in detail the function code,compared with the traditional PID controller introduces the new type of PID controller six new characteristics,facilitate the future in the same type of waste heat furnace for popularization and application.